Consequently, some methods are more applicable to screening when no wells are in the immediate area of the proposed site, while other methods are more applicable after active injection has occurred over some period of time.
These methods are developed for CO2 sequestration in saline formations based on established usage in the petroleum industry.
There are five unique methods for estimating subsurface volumes: volumetric, compressibility (pressure), injection decline
curves, mass balance, and simulation.
These methods each have advantages and disadvantages, and some are considered more reliable than others depending on data quality, data quantity, and geologic heterogeneity.